From:   Xingui Yang <yangxingui@huawei.com>
To:     <jejb@linux.ibm.com>, <martin.petersen@oracle.com>,
        <john.g.garry@oracle.com>
CC:     <linux-scsi@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <linuxarm@huawei.com>, <yangxingui@huawei.com>,
        <prime.zeng@hisilicon.com>, <kangfenglong@huawei.com>
Subject: [PATCH] scsi: libsas: Add end eh callback
Date:   Tue, 21 Mar 2023 07:22:59 +0000
Message-ID: <20230321072259.35366-1-yangxingui@huawei.com>
MIME-Version: 1.0
Content-Type: text/plain
Precedence: bulk

If an error occurs while the disk is processing an NCQ command and the host
received the abnormal SDB FIS, let libata EH to analyze the NCQ error, and
it is not necessary to reset the target to recover.

Then the hisi_sas has some special process to set dev_status to normal when
end the eh for NCQ error without reset the target, so add a callback and
fill it in for the hisi_sas driver.

Signed-off-by: Xingui Yang <yangxingui@huawei.com>
---
 drivers/scsi/hisi_sas/hisi_sas_main.c  | 12 +++++++++---
 drivers/scsi/hisi_sas/hisi_sas_v3_hw.c |  7 +++++--
 drivers/scsi/libsas/sas_ata.c          |  4 ++++
 include/scsi/libsas.h                  |  2 ++
 4 files changed, 20 insertions(+), 5 deletions(-)

diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
index 325d6d6a21c3..61686ead0027 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -1777,9 +1777,6 @@ static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
 	struct device *dev = hisi_hba->dev;
 	int rc;
 
-	if (sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR)
-		sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
-
 	rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
 	if (rc < 0) {
 		dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);
@@ -1967,6 +1964,14 @@ static bool hisi_sas_internal_abort_timeout(struct sas_task *task,
 	return false;
 }
 
+static void hisi_sas_end_eh(struct domain_device *dev)
+{
+	struct hisi_sas_device *sas_dev = dev->lldd_dev;
+
+	if (sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR)
+		sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
+}
+
 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
 {
 	hisi_sas_port_notify_formed(sas_phy);
@@ -2083,6 +2088,7 @@ static struct sas_domain_function_template hisi_sas_transport_ops = {
 	.lldd_write_gpio	= hisi_sas_write_gpio,
 	.lldd_tmf_aborted	= hisi_sas_tmf_aborted,
 	.lldd_abort_timeout	= hisi_sas_internal_abort_timeout,
+	.lldd_end_eh		= hisi_sas_end_eh,
 };
 
 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
index 66fcb340b98e..abad57de4aee 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
@@ -2433,15 +2433,18 @@ static int complete_v3_hw(struct hisi_sas_cq *cq)
 			struct hisi_sas_device *sas_dev =
 				&hisi_hba->devices[device_id];
 			struct domain_device *device = sas_dev->sas_device;
+			bool force_reset = true;
 
 			dev_err(dev, "erroneous completion disk err dev id=%d sas_addr=0x%llx CQ hdr: 0x%x 0x%x 0x%x 0x%x\n",
 				device_id, itct->sas_addr, dw0, dw1,
 				complete_hdr->act, dw3);
 
-			if (is_ncq_err_v3_hw(complete_hdr))
+			if (is_ncq_err_v3_hw(complete_hdr)) {
 				sas_dev->dev_status = HISI_SAS_DEV_NCQ_ERR;
+				force_reset = false;
+			}
 
-			sas_ata_device_link_abort(device, true);
+			sas_ata_device_link_abort(device, force_reset);
 		} else if (likely(iptt < HISI_SAS_COMMAND_ENTRIES_V3_HW)) {
 			slot = &hisi_hba->slot_info[iptt];
 			slot->cmplt_queue_slot = rd_point;
diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c
index 77714a495cbb..2d48643a08cf 100644
--- a/drivers/scsi/libsas/sas_ata.c
+++ b/drivers/scsi/libsas/sas_ata.c
@@ -539,6 +539,10 @@ void sas_ata_end_eh(struct ata_port *ap)
 	spin_lock_irqsave(&ha->lock, flags);
 	if (test_and_clear_bit(SAS_DEV_EH_PENDING, &dev->state))
 		ha->eh_active--;
+
+	if (i->dft->lldd_end_eh)
+		i->dft->lldd_end_eh(device);
+
 	spin_unlock_irqrestore(&ha->lock, flags);
 }
 
diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h
index 159823e0afbf..659395ef616e 100644
--- a/include/scsi/libsas.h
+++ b/include/scsi/libsas.h
@@ -683,6 +683,8 @@ struct sas_domain_function_template {
 	int (*lldd_lu_reset)(struct domain_device *, u8 *lun);
 	int (*lldd_query_task)(struct sas_task *);
 
+	void (*lldd_end_eh)(struct domain_device *dev);
+
 	/* Special TMF callbacks */
 	void (*lldd_tmf_exec_complete)(struct domain_device *dev);
 	void (*lldd_tmf_aborted)(struct sas_task *task);
-- 
2.17.1